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  1. Replies
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    612

    I trained most customers out of this 'dropping...

    I trained most customers out of this 'dropping shit off' approach. I tell 'em straight out, go take it apart and bring in what needs the fixing and clean it up while you're at it. If the disassembly...
  2. I have 4 roller steadies and they all use flat...

    I have 4 roller steadies and they all use flat bearings. One set of bearings has a large corner radius but is nonetheless flat for about 1/4" of width.

    A full crown almost has to have extreme...
  3. This is not an application for a spray weld. That...

    This is not an application for a spray weld. That is only for a sleeve-like buildup on a shaft surface, usually for use under a bearing or a seal.

    The thing about arc welding is that the resultant...
  4. Some guys must ramp into a cut pretty...

    Some guys must ramp into a cut pretty aggressively if they are actually going to crash into the primary relief. In fact, the primary relief itself would still be a problem with such aggressive...
  5. I usually grind a secondary relief first so as to...

    I usually grind a secondary relief first so as to reduce the amount of surface that needs to be ground for the primary. Typically, the secondary relief is almost incidentally formed as I try to grind...
  6. Check the actual end play of the screw against...

    Check the actual end play of the screw against it's thrust housing. Perhaps a custom shim washer will tighten it up considerably. If you can get it down to .030" I wouldn't bother with trying to...
  7. Something that long and that tight is likely...

    Something that long and that tight is likely going to score really badly if you begin to move it, mainly because that is the nature of stainless.
    Heating could only work if you did it quickly...
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    I'd suggest you put it under a turntable in your...

    I'd suggest you put it under a turntable in your garage so you don't have to back your car out :D
  9. Yes, conventional follower rests are a PITA. ...

    Yes, conventional follower rests are a PITA.

    A "C" shape insert is prone to chatter. I would recommend using a T, D or V shape insert on skinny jobs. Or an Iscar style cutgrip with a very...
  10. Replies
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    It is ok to break off the last bit of the...

    It is ok to break off the last bit of the part-off by hand or with a saw. Chances are high that cutting right to center is the moment when you damage the edge of your tool. Even on a CNC with a...
  11. FWIW, I actually built a 30 spindle gearbox (2500...

    FWIW, I actually built a 30 spindle gearbox (2500 rpm) for a dedicated drilling application, and I left the seals in all the bearings. But the gears were splash lubricated. Well the short of it was...
  12. In your photo showing the 80 tooth gear, that is...

    In your photo showing the 80 tooth gear, that is where you need two gears pinned together (one being the 127t) or otherwise driving on a common hub. That is what the guys are calling a compound gear....
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    IMO, this could be easily eliminated: if you call...

    IMO, this could be easily eliminated: if you call somebody, you pay a rate of some sort. If you receive a call, you GET PAID by the minute. The phone company gets a small fee for the accounting and...
  14. Nice set of pictures and good explanation. I'd...

    Nice set of pictures and good explanation.
    I'd probably just make a bushing with an integral flange to take up the wear space on the cap. Machine the cap a bit in the center area to true it up for a...
  15. I'd recommend trying Loctite 262. Needs at least...

    I'd recommend trying Loctite 262. Needs at least .002" clearance fit for assembly, mainly so that you can work the air out of the blind pocket. Properly clean the parts oil free. Allow to set up or...
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    Mainly you have to consider the total depth of...

    Mainly you have to consider the total depth of the feature you are going to mill. The diameter might be commonly about 1/3 to 1/4 of the length of the flute (a 1/4 inch diameter endmill might have a...
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    Sounds to me like the Y offset for that platter's...

    Sounds to me like the Y offset for that platter's work offset is incorrect. That becomes a Z error when the platter is rotated.
  18. Replies
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    I suckered in and bought some (up to driving 1"...

    I suckered in and bought some (up to driving 1" taps). I think they were powder metallurgy sintered forms. Anyways, i dropped one on the floor and it broke very easily. Because I'm a tough guy, I...
  19. The deal with cutting this part to allow it to...

    The deal with cutting this part to allow it to spring and then machining it all over is that you loose all your reference surfaces over and over because it may just keep moving and moving. I'd look...
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    I'd shoot for about .010" diametral clearance....

    I'd shoot for about .010" diametral clearance. Yeah, you could go for .005 but then you'd need a guarantee from the customer that they would go out and grease those every day, even if the machine is...
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    I reserve my cold saw cutting for cuts that...

    I reserve my cold saw cutting for cuts that really matter: generally will not be machined again. And for that reason, I don't mind that it is too slow for aluminum. It will cut aluminum at least as...
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    I never assumed you would do this in a half-assed...

    I never assumed you would do this in a half-assed manner. That is why I questioned the cost effectiveness of 'saving money' by buying a cheap motor online somewhere. The savings will be eaten up in...
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    Practically speaking, what kind of contraption...

    Practically speaking, what kind of contraption will you have to make to configure the mounting of 2 motors to the pump?
    You need a good 150 degree arc of contact on the driving pulley, so it's not...
  24. Opposing surfaces are put in compression by...

    Opposing surfaces are put in compression by drawing or cold rolling. The compression is the same on both sides, so when looking at the stock, you cannot tell anything is amiss, because the forces are...
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    A quick method I use is look up the bolt pitch on...

    A quick method I use is look up the bolt pitch on a standard drill and tap chart I have hanging on the wall. For example, 3/8 UNF is 24 tpi, so just look at what the recommended tap drill is (letter...
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